Pololu Universal Aluminum 3mm Mounting Hub (4-40)

these things are AWESOME! I used them to connect some wheels to my drive motors. The hardest part about it was finding the centering point to secure them at. I DIDN'T want an off center the wheel. I spent several hours with ruler measuring, adjusting, & remeasuring to get it right. Once everything was together correctly, I am pleased with this product.

These are a must for Tamyia Gearbox kits with 3mm Hex Shafts. If your drive gears get stripped these can easily be used to secure drive wheels with minor modification.

Ce sont des incontournables pour les kits Tamyia Gearbox avec axes hexagonaux de 3 mm. Si vos engrenages sont dépouillés, ils peuvent facilement être utilisés pour sécuriser les roues motrices avec des modifications mineures.

Good product, matching expectations. Be careful however to buy the 8 screws 4-40 to fix accessories.

Seule la vis de blocage sur l'axe est fournie, attention de vous procurer a part les 4 vis 4-40 (visserie Américaine) sinon vous ne pourrez pas l'utiliser.